CVE-2023-22351

Privilege escalation via UEFI out-of-bounds write

Published Sep 16, 2024 · Updated Nov 3, 2025

Out-of-bounds write in Intel processor UEFI firmware allows local users with high privileges to escalate privileges through local access. Intel has not disclosed the affected UEFI component, the buffer written past its bounds, or the input that controls the write. Exploitation requires high privileges and local access; the resulting write can alter protected firmware state and interrupt firmware execution.

CVSS severity6.9
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Intel processor UEFI firmware allows local users with high privileges to escalate privileges through local access. Intel has not disclosed the affected UEFI component, the buffer written past its bounds, or the input that controls the write. Exploitation requires high privileges and local access; the resulting write can alter protected firmware state and interrupt firmware execution.

The record

CVE
CVE-2023-22351
Published
Sep 16, 2024
Updated
Nov 3, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.9Intel CorporationCVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L
6.1Intel CorporationCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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